While I've never owned a Sig, i have shot a number of them, and find them to be solid, dependable pistols. A friend let me shoot his Mosquito .22 today, and I was definitely not impressed. The fit and feel were typical high Sig quality, but the trigger was horrid. After a fair amount of take-up, the single action pull was long, heavy, and very gritty. Compared to out of the box .22's I've shot from Ruger and Browning, this trigger would place fourth out of the three! . Yes, I know triggers can smooth out after use, but a maker of Sig's reputation should be able to make sure the trigger is at least acceptable- and this one was far below that level. Ain't gonna buy one.
Chuck
Chuck